package com.hmdp.utils;

import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Component;

import javax.annotation.Resource;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.ZoneOffset;
import java.time.format.DateTimeFormatter;

@Component
public class RedisIdWork {

    //开始时间戳
    private static final long BEGIN_TIMESTAMP=1756339200L;

    private static final int COUNT_BITS=32;

    @Resource
    private StringRedisTemplate stringRedisTemplate;


    public Long nextId(String keyPrefix)
    {
        //生成时间戳
        LocalDateTime now = LocalDateTime.now();
        long nowSecond = now.toEpochSecond(ZoneOffset.UTC);
        long timestamp=nowSecond-BEGIN_TIMESTAMP;

        //生成序列号
        String date = now.format(DateTimeFormatter.ofPattern("yyyy:MM:dd"));

        //自增长
        long count=stringRedisTemplate.opsForValue().increment("icr"+keyPrefix+":"+date);


        //拼接并返回


        return timestamp << COUNT_BITS |count;
    }

//    public static void main(String[] args) {
//
//        LocalDateTime time=LocalDateTime.of(2025,8,28,0,0,0);
//
//        Long second=time.toEpochSecond(ZoneOffset.UTC);
//
//
//        System.out.println("second:"+second);
//
//    }
//



}












